# US 11,078,822 B2 · Method for operating an internal combustion engine installed in a vehicle

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- Number: US 11,078,822 B2
- Document ID: US11078822B2
- Status: Granted
- Kind: B2
- Application number: 16/304,198
- Filed: 2017-05-19
- Published: 2020-10-08
- Granted: 2021-08-03
- Earliest claimed: 2016-05-23
- Assignees: Technische UniversitäT Dresden
- Applicants: Technische Universitaet Dresden
- Inventors: Robert Walter; Tilo Ross; Hans Zellbeck
- Web page: https://patentgrep.com/patent/US11078822B2

## CPC

- F01N 9/00: Electrical control of exhaust gas treating apparatus (monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00; conjoint electrical control of two or more combustion engine functions F02D43/00)
- F02D 41/1406: {with use of a optimisation method, e.g. iteration}
- F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)}
- F02D 41/0047: {Controlling exhaust gas recirculation [EGR] (temperature control with cooler in recirculation circuit F02M26/33)}
- F02D 41/005: {according to engine operating conditions}
- F02D 41/2422: {Selective use of one or more tables}
- F01N 3/2066: {Selective catalytic reduction [SCR]}
- F01N 11/00: Monitoring or diagnostic devices for exhaust-gas treatment apparatus
- F01N 2610/02: the substance being ammonia or urea
- F02D 2250/36: Control for minimising NOx emissions
- F02D 2250/38: Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
- Y02T 10/12: Improving ICE efficiencies
- Y02T 10/40: Engine management systems
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The invention relates to a method for operating an internal combustion engine installed in a vehicle, in particular a diesel engine, in which the instantaneous concentration of a pollutant contained in the exhaust gas, in particular the NOx concentration in the exhaust gas, is measured or calculated in the flow direction after an exhaust gas aftertreatment. Using the determined pollutant concentration, the predefined distance- and/or power-based compliance with pollutant limiting values in mg/km or mg/kWh are monitored by means of specifically influencing the operating parameters of the internal combustion engine and/or an exhaust gas after treatment system in regulated form.

## Claims

### Claim 1

A method for regulating an internal combustion engine installed in a vehicle, wherein the method comprises the steps of evaluating with an engine control system an instantaneous pollutant concentration contained in exhaust gas, in the flow direction after an exhaust gas aftertreatment and, monitoring a predefined distance of travel based compliance with pollutant limiting values in mg/km, and specifically regulating operating parameters of the internal combustion engine or an exhaust gas aftertreatment system based on the instantaneous pollutant concentration so that a limiting value is cumulatively adhered to across a specified minimum distance of travel.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein in addition to the instantaneous pollutant concentration, also at least one of an instantaneous fuel consumption or a foreseeable fuel consumption corresponding to a respective driving situation, depending on a respective driving style, a respective vehicle, vehicle status and environmental factors are taken into consideration, in the case of regulated operation of the internal combustion engine.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein an instantaneous status of an aging process of the exhaust gas aftertreatment system, fuel quality or the quantity, type or quality of chemical compound added to the exhaust gas aftertreatment for a pollutant reduction is/are taken into consideration during regulation.

### Claim 4 (depends on 1)

The method as claimed in claim 1, including the step of regulating manipulation of injected fuel quantity, at a point in time of injection, type of the fuel injection, boost pressure of added combustion air, temperature of the combustion air, temperature or quantity of recirculated exhaust gas, valve control times or engine compression ratio.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein during regulation, a pollutant limiting value allocated to a respective time or respective vehicle position is taken into consideration.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein, during regulation, engine characteristic maps stored in the engine control system, which take different variants into account for the operation of the internal combustion engine, are used.

### Claim 7 (depends on 6)

The method as claimed in claim 6, wherein during regulation, an interpolation is carried out if no engine characteristic map corresponding to a respective operational state of the internal combustion engine is available.

### Claim 8 (depends on 6)

The method according to claim 6, wherein a selection of the different variants is carried out during regulation taking control deviation into consideration without interpolation between the different variants,
a regulation depending on the control deviation with corresponding interpolation or conversion of a reference variable into an operating-point dependent target value for raw emission of the pollutant in g/(kW·h) is carried out and a regulation is carried out as claimed in a modification depending on the control deviation.

### Claim 9 (depends on 1)

The method as claimed in claim 1, wherein a regulation takes place so that a predefined pollutant limiting value of a distance of at least 2 km is adhered to.